Add purchasing data sources and 3D simulation

TrafagSalesExporter/Components/Pages/PurchasingDashboard.razor

@@ -1,6 +1,8 @@
 @page "/einkauf"
+@using System.Globalization
 @using TrafagSalesExporter.Models
 @inject TrafagSalesExporter.Services.IUiTextService UiText
+@inject IJSRuntime JsRuntime
 
 <PageTitle>@T("Einkauf", "Purchasing")</PageTitle>
 
@@ -119,9 +121,76 @@
             </MudTable>
         </MudPaper>
     </MudTabPanel>
+
+    <MudTabPanel Text="@T("3D Simulation", "3D simulation")" Icon="@Icons.Material.Filled.ViewInAr">
+        <MudPaper Class="pa-3 mb-3" Outlined="true">
+            <MudGrid Spacing="2">
+                <MudItem xs="12" md="3">
+                    <MudSelect T="string" Value="_purchasing3dIndicator" ValueChanged="SetPurchasing3dIndicator" Label="@T("Indikator", "Indicator")" Dense="true">
+                        @foreach (var option in Purchasing3dIndicators)
+                        {
+                            <MudSelectItem Value="@option.Key">@T(option.TitleDe, option.TitleEn)</MudSelectItem>
+                        }
+                    </MudSelect>
+                </MudItem>
+                <MudItem xs="12" md="2">
+                    <MudSelect T="string" Value="_purchasing3dChartType" ValueChanged="SetPurchasing3dChartType" Label="@T("Grafik", "Chart")" Dense="true">
+                        <MudSelectItem Value="@("bar")">@T("Balken", "Bars")</MudSelectItem>
+                        <MudSelectItem Value="@("line")">@T("Linie", "Line")</MudSelectItem>
+                        <MudSelectItem Value="@("surface")">@T("Flaeche", "Surface")</MudSelectItem>
+                        <MudSelectItem Value="@("pie")">@T("Kreis", "Pie")</MudSelectItem>
+                    </MudSelect>
+                </MudItem>
+                <MudItem xs="12" md="3">
+                    <MudText Typo="Typo.caption">@T("Preis-/Wechselkurs-Szenario", "Price/exchange-rate scenario")</MudText>
+                    <div class="finance-3d-range-row">
+                        <MudButton Variant="Variant.Outlined" Size="Size.Small" OnClick="@(() => SetPurchasing3dFactorPreset(0.9d))">-10%</MudButton>
+                        <input class="finance-3d-range"
+                               type="range"
+                               min="0.5"
+                               max="1.5"
+                               step="0.01"
+                               value="@_purchasing3dFactor.ToString("0.00", CultureInfo.InvariantCulture)"
+                               @oninput="SetPurchasing3dFactor" />
+                        <MudText Typo="Typo.body2" Class="finance-3d-factor">@_purchasing3dFactor.ToString("0.00", CultureInfo.InvariantCulture)x</MudText>
+                    </div>
+                    <MudText Typo="Typo.caption">
+                        @T("Delta", "Delta"): @FormatScenarioDelta()
+                    </MudText>
+                </MudItem>
+                <MudItem xs="12" md="2">
+                    <MudText Typo="Typo.caption">@T("Beschriftung", "Labels")</MudText>
+                    <div class="finance-3d-range-row">
+                        <input class="finance-3d-range"
+                               type="range"
+                               min="0.8"
+                               max="2.5"
+                               step="0.1"
+                               value="@_purchasing3dLabelScale.ToString("0.0", CultureInfo.InvariantCulture)"
+                               @oninput="SetPurchasing3dLabelScale" />
+                        <MudText Typo="Typo.body2" Class="finance-3d-factor">@_purchasing3dLabelScale.ToString("0.0", CultureInfo.InvariantCulture)x</MudText>
+                    </div>
+                </MudItem>
+                <MudItem xs="12" md="2">
+                    <MudButton Variant="Variant.Outlined" Color="Color.Info" StartIcon="@Icons.Material.Filled.Refresh" OnClick="RenderPurchasing3dAsync">
+                        @T("Neu zeichnen", "Redraw")
+                    </MudButton>
+                </MudItem>
+            </MudGrid>
+        </MudPaper>
+        <MudPaper Class="pa-0 finance-3d-surface purchasing-3d-surface" Elevation="1">
+            <canvas @ref="_purchasing3dCanvas" class="finance-3d-canvas" style="display:block;width:100%;height:100%;touch-action:none;"></canvas>
+        </MudPaper>
+    </MudTabPanel>
 </MudTabs>
 
 @code {
+    private ElementReference _purchasing3dCanvas;
+    private string _purchasing3dIndicator = "spend";
+    private string _purchasing3dChartType = "bar";
+    private double _purchasing3dFactor = 1d;
+    private double _purchasing3dLabelScale = 1.5d;
+
     private readonly List<PurchasingKpiCard> KpiCards =
     [
         new("Spend total", "Total spend", "-", "Netwr CHF historisch", "Historic Netwr CHF", Icons.Material.Filled.Payments, Color.Primary),
@@ -189,12 +258,134 @@
         new("Matrix Vol./WG", "Pivot, Slicer", "Sum(EKPOSet.Netwr CHF)", "Warengruppe, Lieferant, Artikel")
     ];
 
+    private readonly List<Purchasing3dIndicator> Purchasing3dIndicators =
+    [
+        new("spend", "Spend CHF", "Spend CHF", "CHF"),
+        new("openValue", "Offener Bestellwert", "Open order value", "CHF"),
+        new("openQuantity", "Offene Menge", "Open quantity", "Qty"),
+        new("contractValue", "Kontrakt-Restwert", "Contract remaining value", "CHF"),
+        new("supplierScore", "Lieferantenperformance", "Supplier performance", "%")
+    ];
+
+    private readonly List<Purchasing3dBaseRow> Purchasing3dBaseRows =
+    [
+        new("Lieferant A", 2024, 1450000d, 260000d, 11800d, 420000d, 91d),
+        new("Lieferant A", 2025, 1680000d, 310000d, 13200d, 460000d, 93d),
+        new("Lieferant A", 2026, 1820000d, 335000d, 14100d, 490000d, 92d),
+        new("Lieferant B", 2024, 980000d, 190000d, 9300d, 260000d, 86d),
+        new("Lieferant B", 2025, 1120000d, 225000d, 10100d, 315000d, 88d),
+        new("Lieferant B", 2026, 1240000d, 250000d, 10800d, 350000d, 89d),
+        new("Warengruppe Sensorik", 2024, 760000d, 120000d, 6400d, 210000d, 94d),
+        new("Warengruppe Sensorik", 2025, 890000d, 145000d, 7100d, 230000d, 95d),
+        new("Warengruppe Sensorik", 2026, 940000d, 155000d, 7400d, 245000d, 94d),
+        new("Artikel Top 10", 2024, 520000d, 83000d, 2800d, 160000d, 90d),
+        new("Artikel Top 10", 2025, 610000d, 97000d, 3100d, 180000d, 91d),
+        new("Artikel Top 10", 2026, 680000d, 105000d, 3350d, 195000d, 92d)
+    ];
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender)
+            await RenderPurchasing3dAsync();
+    }
+
     private string T(string german, string english) => UiText.Text(german, english);
 
+    private async Task SetPurchasing3dIndicator(string value)
+    {
+        _purchasing3dIndicator = value;
+        await RenderPurchasing3dAsync();
+    }
+
+    private async Task SetPurchasing3dChartType(string value)
+    {
+        _purchasing3dChartType = value;
+        await RenderPurchasing3dAsync();
+    }
+
+    private async Task SetPurchasing3dFactor(ChangeEventArgs args)
+    {
+        if (double.TryParse(Convert.ToString(args.Value, CultureInfo.InvariantCulture), NumberStyles.Number, CultureInfo.InvariantCulture, out var value))
+        {
+            _purchasing3dFactor = Math.Clamp(value, 0.5d, 1.5d);
+            await JsRuntime.InvokeVoidAsync("trafagFinance3d.updateFactor", _purchasing3dCanvas, ScenarioAffectsPurchasingValue ? _purchasing3dFactor : 1d);
+        }
+    }
+
+    private async Task SetPurchasing3dFactorPreset(double value)
+    {
+        _purchasing3dFactor = Math.Clamp(value, 0.5d, 1.5d);
+        await JsRuntime.InvokeVoidAsync("trafagFinance3d.updateFactor", _purchasing3dCanvas, ScenarioAffectsPurchasingValue ? _purchasing3dFactor : 1d);
+    }
+
+    private async Task SetPurchasing3dLabelScale(ChangeEventArgs args)
+    {
+        if (double.TryParse(Convert.ToString(args.Value, CultureInfo.InvariantCulture), NumberStyles.Number, CultureInfo.InvariantCulture, out var value))
+        {
+            _purchasing3dLabelScale = Math.Clamp(value, 0.8d, 2.5d);
+            await RenderPurchasing3dAsync();
+        }
+    }
+
+    private async Task RenderPurchasing3dAsync()
+    {
+        await JsRuntime.InvokeVoidAsync("trafagFinance3d.render", _purchasing3dCanvas, BuildPurchasing3dRows(), new
+        {
+            indicator = _purchasing3dIndicator,
+            title = ResolvePurchasing3dIndicatorLabel(),
+            chartType = _purchasing3dChartType,
+            xAxis = T("X: Lieferant / Warengruppe / Artikel", "X: supplier / material group / article"),
+            yAxis = T("Y: Wert / Menge / Score", "Y: value / quantity / score"),
+            zAxis = T("Z: Jahr / Zeit", "Z: year / time"),
+            pieAxis = T("Kreis: Anteil am aktuellen Indikator", "Pie: share of current indicator"),
+            labelScale = _purchasing3dLabelScale,
+            scenarioFactor = ScenarioAffectsPurchasingValue ? _purchasing3dFactor : 1d
+        });
+    }
+
+    private IReadOnlyList<object> BuildPurchasing3dRows()
+        => Purchasing3dBaseRows
+            .Select(row => new
+            {
+                country = row.Axis,
+                year = row.Year,
+                value = ResolvePurchasing3dValue(row)
+            })
+            .Cast<object>()
+            .ToList();
+
+    private double ResolvePurchasing3dValue(Purchasing3dBaseRow row) => _purchasing3dIndicator switch
+    {
+        "openValue" => row.OpenValue,
+        "openQuantity" => row.OpenQuantity,
+        "contractValue" => row.ContractValue,
+        "supplierScore" => row.SupplierScore,
+        _ => row.Spend
+    };
+
+    private bool ScenarioAffectsPurchasingValue => _purchasing3dIndicator is "spend" or "openValue" or "contractValue";
+
+    private string ResolvePurchasing3dIndicatorLabel()
+        => T(
+            Purchasing3dIndicators.FirstOrDefault(x => x.Key == _purchasing3dIndicator)?.TitleDe ?? "Spend CHF",
+            Purchasing3dIndicators.FirstOrDefault(x => x.Key == _purchasing3dIndicator)?.TitleEn ?? "Spend CHF");
+
+    private string FormatScenarioDelta()
+    {
+        if (!ScenarioAffectsPurchasingValue)
+            return T("nicht auf diesen Indikator angewendet", "not applied to this indicator");
+
+        var baseTotal = Purchasing3dBaseRows.Sum(ResolvePurchasing3dValue);
+        var delta = baseTotal * _purchasing3dFactor - baseTotal;
+        return $"{delta:N0} {Purchasing3dIndicators.First(x => x.Key == _purchasing3dIndicator).Unit}";
+    }
+
     private sealed record PurchasingKpiCard(string TitleDe, string TitleEn, string Value, string DetailDe, string DetailEn, string Icon, Color Color);
     private sealed record PurchasingAxis(string LabelDe, string LabelEn, string Field, string UsageDe, string UsageEn);
     private sealed record PurchasingSource(string Name, string Description);
     private sealed record PowerBiPageInfo(string Page, string Visuals, string Measure, string Dimensions);
+    private sealed record Purchasing3dIndicator(string Key, string TitleDe, string TitleEn, string Unit);
+    private sealed record Purchasing3dBaseRow(string Axis, int Year, double Spend, double OpenValue, double OpenQuantity, double ContractValue, double SupplierScore);
 }
 
 <style>
@@ -218,4 +409,10 @@
     .purchasing-source-row:last-child {
         border-bottom: 0;
     }
+
+    .purchasing-3d-surface {
+        height: calc(100vh - 300px);
+        min-height: 620px;
+        overflow: hidden;
+    }
 </style>

TrafagSalesExporter/Components/Pages/PurchasingDataSources.razor

@@ -0,0 +1,272 @@
+@page "/einkauf/verbindungen"
+@using TrafagSalesExporter.Services
+@inject IPurchasingDataSourcePageService DataSourceService
+@inject TrafagSalesExporter.Services.IUiTextService UiText
+@inject ISnackbar Snackbar
+
+<PageTitle>@T("Einkauf Datenquellen", "Purchasing data sources")</PageTitle>
+
+<MudText Typo="Typo.h4" Class="mb-1">@T("Einkauf Datenquellen", "Purchasing data sources")</MudText>
+<MudText Typo="Typo.body2" Class="mb-4 purchasing-muted">
+    @T("Grafische SAP/OData-Anbindung fuer das Einkaufsdashboard, analog zur Finance-Quellenpflege.",
+       "Graphical SAP/OData connection for the purchasing dashboard, following the finance source configuration pattern.")
+</MudText>
+
+@if (_loading)
+{
+    <MudProgressLinear Indeterminate="true" />
+}
+else
+{
+    <MudGrid Spacing="2" Class="mb-4">
+        <MudItem xs="12" md="7">
+            <MudPaper Class="pa-3" Outlined="true">
+                <MudText Typo="Typo.h6" Class="mb-3">@T("Verbindung", "Connection")</MudText>
+                <MudGrid Spacing="2">
+                    <MudItem xs="12" sm="6">
+                        <MudTextField Value="_state.Site.TSC" Label="TSC" ReadOnly="true" />
+                    </MudItem>
+                    <MudItem xs="12" sm="6">
+                        <MudTextField Value="_state.Site.SourceSystem" Label="@T("Quellsystem", "Source system")" ReadOnly="true" />
+                    </MudItem>
+                    <MudItem xs="12">
+                        <MudTextField @bind-Value="_state.Site.SapServiceUrl"
+                                      Label="SAP Service URL Override"
+                                      HelperText="@T("Leer lassen = zentrale SAP OData URL aus Settings verwenden.", "Leave empty = use central SAP OData URL from settings.")" />
+                    </MudItem>
+                    <MudItem xs="12" sm="6">
+                        <MudTextField @bind-Value="_state.Site.UsernameOverride"
+                                      Label="Username Override"
+                                      HelperText="@T("Leer lassen = zentraler SAP User.", "Leave empty = central SAP user.")" />
+                    </MudItem>
+                    <MudItem xs="12" sm="6">
+                        <MudTextField @bind-Value="_state.Site.PasswordOverride"
+                                      Label="Password Override"
+                                      InputType="InputType.Password"
+                                      HelperText="@T("Leer lassen = zentrales SAP Passwort.", "Leave empty = central SAP password.")" />
+                    </MudItem>
+                    <MudItem xs="12">
+                        <MudCheckBox @bind-Value="_state.Site.IsActive"
+                                     Label="@T("Einkaufsquelle fuer Import aktivieren", "Activate purchasing source for import")" />
+                    </MudItem>
+                </MudGrid>
+                <MudStack Row="true" Spacing="2" Class="mt-3">
+                    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Save" OnClick="SaveAsync" Disabled="_busy">
+                        @T("Speichern", "Save")
+                    </MudButton>
+                    <MudButton Variant="Variant.Outlined" Color="Color.Info" StartIcon="@Icons.Material.Filled.NetworkCheck" OnClick="TestConnectionAsync" Disabled="_busy">
+                        @T("Verbindung testen", "Test connection")
+                    </MudButton>
+                    <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Restore" OnClick="ResetDefaultsAsync" Disabled="_busy">
+                        @T("Defaults wiederherstellen", "Restore defaults")
+                    </MudButton>
+                </MudStack>
+            </MudPaper>
+        </MudItem>
+        <MudItem xs="12" md="5">
+            <MudPaper Class="pa-3" Outlined="true">
+                <MudText Typo="Typo.h6" Class="mb-2">@T("Aktuelle Basis", "Current basis")</MudText>
+                <div class="purchasing-source-row">
+                    <MudIcon Icon="@Icons.Material.Filled.CloudQueue" Size="Size.Small" />
+                    <span>@T("Zentrale URL", "Central URL"): <code>@Display(_state.SourceSystem?.CentralServiceUrl)</code></span>
+                </div>
+                <div class="purchasing-source-row">
+                    <MudIcon Icon="@Icons.Material.Filled.TableChart" Size="Size.Small" />
+                    <span>@T("Quellen", "Sources"): @_state.Sources.Count(x => x.IsActive)</span>
+                </div>
+                <div class="purchasing-source-row">
+                    <MudIcon Icon="@Icons.Material.Filled.AccountTree" Size="Size.Small" />
+                    <span>@T("Joins", "Joins"): @_state.Joins.Count(x => x.IsActive)</span>
+                </div>
+                <div class="purchasing-source-row">
+                    <MudIcon Icon="@Icons.Material.Filled.Schema" Size="Size.Small" />
+                    <span>@T("Mappings", "Mappings"): @_state.Mappings.Count(x => x.IsActive)</span>
+                </div>
+            </MudPaper>
+        </MudItem>
+    </MudGrid>
+
+    <MudTabs Elevation="1" Rounded="false" PanelClass="pt-4">
+        <MudTabPanel Text="@T("Quellen", "Sources")" Icon="@Icons.Material.Filled.Hub">
+            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">@T("OData Entity Sets", "OData entity sets")</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddSource">@T("Quelle", "Source")</MudButton>
+            </MudStack>
+            <MudTable Items="_state.Sources" Dense="true" Hover="true" Striped="true">
+                <HeaderContent>
+                    <MudTh>Alias</MudTh>
+                    <MudTh>Entity Set</MudTh>
+                    <MudTh>@T("Primaer", "Primary")</MudTh>
+                    <MudTh>@T("Aktiv", "Active")</MudTh>
+                    <MudTh></MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd><MudTextField @bind-Value="context.Alias" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.EntitySet" Dense="true" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsPrimary" Dense="true" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveSource(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
+        </MudTabPanel>
+
+        <MudTabPanel Text="@T("Join-Fluss", "Join flow")" Icon="@Icons.Material.Filled.AccountTree">
+            <MudGrid Spacing="2" Class="mb-3">
+                @foreach (var join in _state.Joins.Where(x => x.IsActive))
+                {
+                    <MudItem xs="12" sm="6" lg="3">
+                        <MudPaper Class="pa-3 purchasing-flow" Outlined="true">
+                            <MudText Typo="Typo.subtitle2">@join.LeftAlias -> @join.RightAlias</MudText>
+                            <MudText Typo="Typo.caption">@join.LeftKeys = @join.RightKeys</MudText>
+                        </MudPaper>
+                    </MudItem>
+                }
+            </MudGrid>
+            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">@T("Joins", "Joins")</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddJoin">@T("Join", "Join")</MudButton>
+            </MudStack>
+            <MudTable Items="_state.Joins" Dense="true" Hover="true" Striped="true">
+                <HeaderContent>
+                    <MudTh>@T("Links", "Left")</MudTh>
+                    <MudTh>Left Keys</MudTh>
+                    <MudTh>@T("Rechts", "Right")</MudTh>
+                    <MudTh>Right Keys</MudTh>
+                    <MudTh>@T("Typ", "Type")</MudTh>
+                    <MudTh>@T("Aktiv", "Active")</MudTh>
+                    <MudTh></MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd><MudTextField @bind-Value="context.LeftAlias" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.LeftKeys" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.RightAlias" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.RightKeys" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.JoinType" Dense="true" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveJoin(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
+        </MudTabPanel>
+
+        <MudTabPanel Text="@T("Mapping", "Mapping")" Icon="@Icons.Material.Filled.Schema">
+            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
+                <MudText Typo="Typo.h6">@T("Zielfelder", "Target fields")</MudText>
+                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddMapping">@T("Mapping", "Mapping")</MudButton>
+            </MudStack>
+            <MudTable Items="_state.Mappings" Dense="true" Hover="true" Striped="true">
+                <HeaderContent>
+                    <MudTh>@T("Ziel", "Target")</MudTh>
+                    <MudTh>@T("Quelle", "Source")</MudTh>
+                    <MudTh>@T("Pflicht", "Required")</MudTh>
+                    <MudTh>@T("Aktiv", "Active")</MudTh>
+                    <MudTh></MudTh>
+                </HeaderContent>
+                <RowTemplate>
+                    <MudTd><MudTextField @bind-Value="context.TargetField" Dense="true" /></MudTd>
+                    <MudTd><MudTextField @bind-Value="context.SourceExpression" Dense="true" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsRequired" Dense="true" /></MudTd>
+                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
+                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveMapping(context)" /></MudTd>
+                </RowTemplate>
+            </MudTable>
+        </MudTabPanel>
+    </MudTabs>
+}
+
+@code {
+    private PurchasingDataSourceState _state = new();
+    private bool _loading = true;
+    private bool _busy;
+
+    protected override async Task OnInitializedAsync()
+    {
+        _state = await DataSourceService.LoadAsync();
+        _loading = false;
+    }
+
+    private async Task SaveAsync()
+    {
+        await RunAsync(async () =>
+        {
+            _state = await DataSourceService.SaveAsync(_state);
+            Snackbar.Add(T("Einkaufsdatenquellen gespeichert.", "Purchasing data sources saved."), Severity.Success);
+        });
+    }
+
+    private async Task ResetDefaultsAsync()
+    {
+        await RunAsync(async () =>
+        {
+            _state = await DataSourceService.ResetDefaultsAsync();
+            Snackbar.Add(T("Einkaufsdatenquellen auf Defaults gesetzt.", "Purchasing data sources restored to defaults."), Severity.Info);
+        });
+    }
+
+    private async Task TestConnectionAsync()
+    {
+        await RunAsync(async () =>
+        {
+            var result = await DataSourceService.TestConnectionAsync(_state);
+            Snackbar.Add(result.Message, result.Success ? Severity.Success : result.Warning ? Severity.Warning : Severity.Error);
+        });
+    }
+
+    private async Task RunAsync(Func<Task> action)
+    {
+        if (_busy)
+            return;
+
+        _busy = true;
+        try
+        {
+            await action();
+        }
+        catch (Exception ex)
+        {
+            Snackbar.Add(ex.Message, Severity.Error);
+        }
+        finally
+        {
+            _busy = false;
+        }
+    }
+
+    private void AddSource()
+        => _state.Sources.Add(new SapSourceDefinition { Alias = "NEW", EntitySet = "NewEntitySet", IsActive = true, SortOrder = (_state.Sources.Count + 1) * 10 });
+
+    private void AddJoin()
+        => _state.Joins.Add(new SapJoinDefinition { LeftAlias = "EKKO", RightAlias = "NEW", LeftKeys = "Key", RightKeys = "Key", JoinType = "Left", IsActive = true, SortOrder = (_state.Joins.Count + 1) * 10 });
+
+    private void AddMapping()
+        => _state.Mappings.Add(new SapFieldMapping { TargetField = "NewField", SourceExpression = "Alias.Field", IsActive = true, SortOrder = (_state.Mappings.Count + 1) * 10 });
+
+    private void RemoveSource(SapSourceDefinition source) => _state.Sources.Remove(source);
+    private void RemoveJoin(SapJoinDefinition join) => _state.Joins.Remove(join);
+    private void RemoveMapping(SapFieldMapping mapping) => _state.Mappings.Remove(mapping);
+
+    private string T(string german, string english) => UiText.Text(german, english);
+    private static string Display(string? value) => string.IsNullOrWhiteSpace(value) ? "-" : value;
+}
+
+<style>
+    .purchasing-muted {
+        color: var(--mud-palette-text-secondary);
+    }
+
+    .purchasing-flow {
+        min-height: 86px;
+    }
+
+    .purchasing-source-row {
+        display: grid;
+        grid-template-columns: 26px minmax(0, 1fr);
+        align-items: center;
+        gap: 8px;
+        padding: 7px 0;
+        border-bottom: 1px solid var(--mud-palette-lines-default);
+    }
+
+    .purchasing-source-row:last-child {
+        border-bottom: 0;
+    }
+</style>

TrafagSalesExporter/Program.cs

@@ -114,6 +114,7 @@ builder.Services.AddScoped<IDashboardPageService, DashboardPageService>();
 builder.Services.AddScoped<ILogsPageService, LogsPageService>();
 builder.Services.AddScoped<ITransformationsPageService, TransformationsPageService>();
 builder.Services.AddScoped<IFinanceRulesPageService, FinanceRulesPageService>();
+builder.Services.AddScoped<IPurchasingDataSourcePageService, PurchasingDataSourcePageService>();
 builder.Services.AddScoped<IHrKpiAccessService, HrKpiAccessService>();
 builder.Services.AddScoped<IFinanceCockpitAccessService, FinanceCockpitAccessService>();
 builder.Services.AddScoped<IAdminAccessService, AdminAccessService>();

TrafagSalesExporter/Services/DatabaseSeedService.cs

@@ -17,6 +17,7 @@ public class DatabaseSeedService : IDatabaseSeedService
         EnsureGermanyManualExcelSite(db);
         EnsureUkManualExcelFolder(db);
         EnsureSapODataDachSite(db);
+        EnsurePurchasingSapSite(db);
         EnsureFinanceReferenceDefaults(db);
         EnsureBudgetExchangeRateDefaults(db);
         EnsureFinanceIntercompanyRuleDefaults(db);
@@ -180,6 +181,7 @@ public class DatabaseSeedService : IDatabaseSeedService
         Link("hr-training", "hr", "HR KPI Schulung", "HR KPI training", "School", "hr-kpi/schulung", 20),
         Group("purchasing", null, "Einkauf", "Purchasing", "ShoppingCart", 30),
         Link("purchasing-dashboard", "purchasing", "Einkauf Dashboard", "Purchasing dashboard", "Dashboard", "einkauf", 10, "All"),
+        Link("purchasing-data-sources", "purchasing", "Datenquellen", "Data sources", "Hub", "einkauf/verbindungen", 20, "All"),
         Link("admin-sessions", null, "Admin Bereich", "Admin area", "PeopleAlt", "admin/sessions", 90)
     ];
 
@@ -968,6 +970,89 @@ public class DatabaseSeedService : IDatabaseSeedService
             db.SaveChanges();
     }
 
+    private static void EnsurePurchasingSapSite(AppDbContext db)
+    {
+        if (db.Sites.Count() <= 1)
+            return;
+
+        var site = db.Sites
+            .OrderBy(x => x.Id)
+            .FirstOrDefault(x => x.TSC == PurchasingDataSourcePageService.PurchasingTsc);
+
+        var changed = false;
+        if (site is null)
+        {
+            site = new Site
+            {
+                Schema = string.Empty,
+                TSC = PurchasingDataSourcePageService.PurchasingTsc,
+                Land = "Einkauf SAP",
+                SourceSystem = "SAP",
+                IsActive = false
+            };
+            db.Sites.Add(site);
+            db.SaveChanges();
+        }
+        else
+        {
+            if (site.SourceSystem != "SAP")
+            {
+                site.SourceSystem = "SAP";
+                changed = true;
+            }
+
+            if (string.IsNullOrWhiteSpace(site.Land))
+            {
+                site.Land = "Einkauf SAP";
+                changed = true;
+            }
+        }
+
+        if (!db.SapSourceDefinitions.Any(x => x.SiteId == site.Id))
+        {
+            db.SapSourceDefinitions.AddRange(
+                new SapSourceDefinition { SiteId = site.Id, Alias = "EKKO", EntitySet = "EKKOSet", IsPrimary = true, IsActive = true, SortOrder = 10 },
+                new SapSourceDefinition { SiteId = site.Id, Alias = "EKPO", EntitySet = "EKPOSet", IsPrimary = false, IsActive = true, SortOrder = 20 },
+                new SapSourceDefinition { SiteId = site.Id, Alias = "EKET", EntitySet = "eketSet", IsPrimary = false, IsActive = true, SortOrder = 30 },
+                new SapSourceDefinition { SiteId = site.Id, Alias = "LIEF", EntitySet = "Data", IsPrimary = false, IsActive = true, SortOrder = 40 },
+                new SapSourceDefinition { SiteId = site.Id, Alias = "WG", EntitySet = "Data2", IsPrimary = false, IsActive = true, SortOrder = 50 });
+            changed = true;
+        }
+
+        if (!db.SapJoinDefinitions.Any(x => x.SiteId == site.Id))
+        {
+            db.SapJoinDefinitions.AddRange(
+                new SapJoinDefinition { SiteId = site.Id, LeftAlias = "EKKO", RightAlias = "EKPO", LeftKeys = "Ebeln", RightKeys = "Ebeln", JoinType = "Left", IsActive = true, SortOrder = 10 },
+                new SapJoinDefinition { SiteId = site.Id, LeftAlias = "EKPO", RightAlias = "EKET", LeftKeys = "Ebeln,Ebelp", RightKeys = "Ebeln,Ebelp", JoinType = "Left", IsActive = true, SortOrder = 20 },
+                new SapJoinDefinition { SiteId = site.Id, LeftAlias = "EKKO", RightAlias = "LIEF", LeftKeys = "Lifnr", RightKeys = "Lifnr", JoinType = "Left", IsActive = true, SortOrder = 30 },
+                new SapJoinDefinition { SiteId = site.Id, LeftAlias = "EKPO", RightAlias = "WG", LeftKeys = "Matkl", RightKeys = "Matkl", JoinType = "Left", IsActive = true, SortOrder = 40 });
+            changed = true;
+        }
+
+        if (!db.SapFieldMappings.Any(x => x.SiteId == site.Id))
+        {
+            db.SapFieldMappings.AddRange(
+                new SapFieldMapping { SiteId = site.Id, TargetField = "PurchaseOrder", SourceExpression = "EKKO.Ebeln", IsRequired = true, IsActive = true, SortOrder = 10 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "PurchaseOrderDate", SourceExpression = "EKKO.Bedat", IsRequired = true, IsActive = true, SortOrder = 20 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "SupplierNumber", SourceExpression = "EKKO.Lifnr", IsRequired = false, IsActive = true, SortOrder = 30 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "SupplierName", SourceExpression = "LIEF.Name", IsRequired = false, IsActive = true, SortOrder = 40 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "Position", SourceExpression = "EKPO.Ebelp", IsRequired = true, IsActive = true, SortOrder = 50 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "Material", SourceExpression = "EKPO.Matnr", IsRequired = false, IsActive = true, SortOrder = 60 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "MaterialText", SourceExpression = "EKPO.Txz01", IsRequired = false, IsActive = true, SortOrder = 70 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "MaterialGroup", SourceExpression = "EKPO.Matkl", IsRequired = false, IsActive = true, SortOrder = 80 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "MaterialGroupText", SourceExpression = "WG.WgKomplett", IsRequired = false, IsActive = true, SortOrder = 90 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "NetValueChf", SourceExpression = "EKPO.NetwrChf", IsRequired = false, IsActive = true, SortOrder = 100 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "NetValueChfPerPiece", SourceExpression = "EKPO.NetwrChfStk", IsRequired = false, IsActive = true, SortOrder = 110 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "OrderQuantity", SourceExpression = "EKPO.Menge", IsRequired = false, IsActive = true, SortOrder = 120 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "ScheduleDate", SourceExpression = "EKET.Eindt", IsRequired = false, IsActive = true, SortOrder = 130 },
+                new SapFieldMapping { SiteId = site.Id, TargetField = "ScheduleQuantity", SourceExpression = "EKET.Menge", IsRequired = false, IsActive = true, SortOrder = 140 });
+            changed = true;
+        }
+
+        if (changed)
+            db.SaveChanges();
+    }
+
     private static void EnsureFinanceReferenceDefaults(AppDbContext db)
     {
         var defaults = new[]

TrafagSalesExporter/Services/IPurchasingDataSourcePageService.cs

@@ -0,0 +1,20 @@
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public interface IPurchasingDataSourcePageService
+{
+    Task<PurchasingDataSourceState> LoadAsync();
+    Task<PurchasingDataSourceState> SaveAsync(PurchasingDataSourceState state);
+    Task<PurchasingDataSourceState> ResetDefaultsAsync();
+    Task<PageActionResult> TestConnectionAsync(PurchasingDataSourceState state);
+}
+
+public sealed class PurchasingDataSourceState
+{
+    public Site Site { get; set; } = new();
+    public SourceSystemDefinition? SourceSystem { get; set; }
+    public List<SapSourceDefinition> Sources { get; set; } = [];
+    public List<SapJoinDefinition> Joins { get; set; } = [];
+    public List<SapFieldMapping> Mappings { get; set; } = [];
+}

TrafagSalesExporter/Services/PurchasingDataSourcePageService.cs

@@ -0,0 +1,240 @@
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public sealed class PurchasingDataSourcePageService : IPurchasingDataSourcePageService
+{
+    public const string PurchasingTsc = "PURCHASING_SAP";
+
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+    private readonly ISapGatewayService _sapGatewayService;
+
+    public PurchasingDataSourcePageService(IDbContextFactory<AppDbContext> dbFactory, ISapGatewayService sapGatewayService)
+    {
+        _dbFactory = dbFactory;
+        _sapGatewayService = sapGatewayService;
+    }
+
+    public async Task<PurchasingDataSourceState> LoadAsync()
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        await EnsureDefaultsAsync(db);
+        return await LoadStateAsync(db);
+    }
+
+    public async Task<PurchasingDataSourceState> SaveAsync(PurchasingDataSourceState state)
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        var site = await GetOrCreateSiteAsync(db);
+
+        site.SapServiceUrl = state.Site.SapServiceUrl.Trim();
+        site.UsernameOverride = state.Site.UsernameOverride.Trim();
+        site.PasswordOverride = state.Site.PasswordOverride;
+        site.IsActive = state.Site.IsActive;
+
+        Replace(db, db.SapSourceDefinitions.Where(x => x.SiteId == site.Id), state.Sources.Select((x, i) => new SapSourceDefinition
+        {
+            SiteId = site.Id,
+            Alias = x.Alias.Trim(),
+            EntitySet = x.EntitySet.Trim(),
+            IsPrimary = x.IsPrimary,
+            IsActive = x.IsActive,
+            SortOrder = x.SortOrder == 0 ? i * 10 : x.SortOrder
+        }));
+
+        Replace(db, db.SapJoinDefinitions.Where(x => x.SiteId == site.Id), state.Joins.Select((x, i) => new SapJoinDefinition
+        {
+            SiteId = site.Id,
+            LeftAlias = x.LeftAlias.Trim(),
+            RightAlias = x.RightAlias.Trim(),
+            LeftKeys = x.LeftKeys.Trim(),
+            RightKeys = x.RightKeys.Trim(),
+            JoinType = string.IsNullOrWhiteSpace(x.JoinType) ? "Left" : x.JoinType.Trim(),
+            IsActive = x.IsActive,
+            SortOrder = x.SortOrder == 0 ? i * 10 : x.SortOrder
+        }));
+
+        Replace(db, db.SapFieldMappings.Where(x => x.SiteId == site.Id), state.Mappings.Select((x, i) => new SapFieldMapping
+        {
+            SiteId = site.Id,
+            TargetField = x.TargetField.Trim(),
+            SourceExpression = x.SourceExpression.Trim(),
+            IsRequired = x.IsRequired,
+            IsActive = x.IsActive,
+            SortOrder = x.SortOrder == 0 ? i * 10 : x.SortOrder
+        }));
+
+        await db.SaveChangesAsync();
+        return await LoadStateAsync(db);
+    }
+
+    public async Task<PurchasingDataSourceState> ResetDefaultsAsync()
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        var site = await GetOrCreateSiteAsync(db);
+
+        db.SapSourceDefinitions.RemoveRange(db.SapSourceDefinitions.Where(x => x.SiteId == site.Id));
+        db.SapJoinDefinitions.RemoveRange(db.SapJoinDefinitions.Where(x => x.SiteId == site.Id));
+        db.SapFieldMappings.RemoveRange(db.SapFieldMappings.Where(x => x.SiteId == site.Id));
+        await db.SaveChangesAsync();
+
+        AddDefaultSources(db, site.Id);
+        AddDefaultJoins(db, site.Id);
+        AddDefaultMappings(db, site.Id);
+        await db.SaveChangesAsync();
+
+        return await LoadStateAsync(db);
+    }
+
+    public async Task<PageActionResult> TestConnectionAsync(PurchasingDataSourceState state)
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        var sourceSystem = await db.SourceSystemDefinitions
+            .AsNoTracking()
+            .OrderBy(x => x.Id)
+            .FirstOrDefaultAsync(x => x.Code == "SAP");
+
+        var serviceUrl = string.IsNullOrWhiteSpace(state.Site.SapServiceUrl)
+            ? sourceSystem?.CentralServiceUrl ?? string.Empty
+            : state.Site.SapServiceUrl;
+        var username = string.IsNullOrWhiteSpace(state.Site.UsernameOverride)
+            ? sourceSystem?.CentralUsername ?? string.Empty
+            : state.Site.UsernameOverride;
+        var password = string.IsNullOrWhiteSpace(state.Site.PasswordOverride)
+            ? sourceSystem?.CentralPassword ?? string.Empty
+            : state.Site.PasswordOverride;
+
+        if (string.IsNullOrWhiteSpace(serviceUrl))
+            return PageActionResult.WarningResult("Keine SAP Service URL gepflegt.");
+        if (string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
+            return PageActionResult.WarningResult("Keine SAP Gateway Zugangsdaten gepflegt.");
+
+        try
+        {
+            await _sapGatewayService.TestConnectionAsync(serviceUrl.Trim(), username.Trim(), password);
+            return PageActionResult.SuccessResult("SAP OData Verbindung erfolgreich.");
+        }
+        catch (Exception ex)
+        {
+            return PageActionResult.ErrorResult($"SAP OData Verbindung fehlgeschlagen: {ex.Message}");
+        }
+    }
+
+    private async Task<PurchasingDataSourceState> LoadStateAsync(AppDbContext db)
+    {
+        var site = await GetOrCreateSiteAsync(db);
+        var sourceSystem = await db.SourceSystemDefinitions
+            .AsNoTracking()
+            .OrderBy(x => x.Id)
+            .FirstOrDefaultAsync(x => x.Code == "SAP");
+
+        return new PurchasingDataSourceState
+        {
+            Site = Clone(site),
+            SourceSystem = sourceSystem,
+            Sources = await db.SapSourceDefinitions.AsNoTracking().Where(x => x.SiteId == site.Id).OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync(),
+            Joins = await db.SapJoinDefinitions.AsNoTracking().Where(x => x.SiteId == site.Id).OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync(),
+            Mappings = await db.SapFieldMappings.AsNoTracking().Where(x => x.SiteId == site.Id).OrderBy(x => x.SortOrder).ThenBy(x => x.Id).ToListAsync()
+        };
+    }
+
+    private static async Task EnsureDefaultsAsync(AppDbContext db)
+    {
+        var site = await GetOrCreateSiteAsync(db);
+        var hasSources = await db.SapSourceDefinitions.AnyAsync(x => x.SiteId == site.Id);
+        if (hasSources)
+            return;
+
+        AddDefaultSources(db, site.Id);
+        AddDefaultJoins(db, site.Id);
+        AddDefaultMappings(db, site.Id);
+        await db.SaveChangesAsync();
+    }
+
+    private static async Task<Site> GetOrCreateSiteAsync(AppDbContext db)
+    {
+        var site = await db.Sites.OrderBy(x => x.Id).FirstOrDefaultAsync(x => x.TSC == PurchasingTsc);
+        if (site is not null)
+            return site;
+
+        site = new Site
+        {
+            Schema = string.Empty,
+            TSC = PurchasingTsc,
+            Land = "Einkauf SAP",
+            SourceSystem = "SAP",
+            IsActive = false
+        };
+        db.Sites.Add(site);
+        await db.SaveChangesAsync();
+        return site;
+    }
+
+    private static void AddDefaultSources(AppDbContext db, int siteId)
+    {
+        db.SapSourceDefinitions.AddRange(
+            new SapSourceDefinition { SiteId = siteId, Alias = "EKKO", EntitySet = "EKKOSet", IsPrimary = true, IsActive = true, SortOrder = 10 },
+            new SapSourceDefinition { SiteId = siteId, Alias = "EKPO", EntitySet = "EKPOSet", IsPrimary = false, IsActive = true, SortOrder = 20 },
+            new SapSourceDefinition { SiteId = siteId, Alias = "EKET", EntitySet = "eketSet", IsPrimary = false, IsActive = true, SortOrder = 30 },
+            new SapSourceDefinition { SiteId = siteId, Alias = "LIEF", EntitySet = "Data", IsPrimary = false, IsActive = true, SortOrder = 40 },
+            new SapSourceDefinition { SiteId = siteId, Alias = "WG", EntitySet = "Data2", IsPrimary = false, IsActive = true, SortOrder = 50 });
+    }
+
+    private static void AddDefaultJoins(AppDbContext db, int siteId)
+    {
+        db.SapJoinDefinitions.AddRange(
+            new SapJoinDefinition { SiteId = siteId, LeftAlias = "EKKO", RightAlias = "EKPO", LeftKeys = "Ebeln", RightKeys = "Ebeln", JoinType = "Left", IsActive = true, SortOrder = 10 },
+            new SapJoinDefinition { SiteId = siteId, LeftAlias = "EKPO", RightAlias = "EKET", LeftKeys = "Ebeln,Ebelp", RightKeys = "Ebeln,Ebelp", JoinType = "Left", IsActive = true, SortOrder = 20 },
+            new SapJoinDefinition { SiteId = siteId, LeftAlias = "EKKO", RightAlias = "LIEF", LeftKeys = "Lifnr", RightKeys = "Lifnr", JoinType = "Left", IsActive = true, SortOrder = 30 },
+            new SapJoinDefinition { SiteId = siteId, LeftAlias = "EKPO", RightAlias = "WG", LeftKeys = "Matkl", RightKeys = "Matkl", JoinType = "Left", IsActive = true, SortOrder = 40 });
+    }
+
+    private static void AddDefaultMappings(AppDbContext db, int siteId)
+    {
+        db.SapFieldMappings.AddRange(
+            new SapFieldMapping { SiteId = siteId, TargetField = "PurchaseOrder", SourceExpression = "EKKO.Ebeln", IsRequired = true, IsActive = true, SortOrder = 10 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "PurchaseOrderDate", SourceExpression = "EKKO.Bedat", IsRequired = true, IsActive = true, SortOrder = 20 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "SupplierNumber", SourceExpression = "EKKO.Lifnr", IsRequired = false, IsActive = true, SortOrder = 30 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "SupplierName", SourceExpression = "LIEF.Name", IsRequired = false, IsActive = true, SortOrder = 40 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "Position", SourceExpression = "EKPO.Ebelp", IsRequired = true, IsActive = true, SortOrder = 50 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "Material", SourceExpression = "EKPO.Matnr", IsRequired = false, IsActive = true, SortOrder = 60 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "MaterialText", SourceExpression = "EKPO.Txz01", IsRequired = false, IsActive = true, SortOrder = 70 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "MaterialGroup", SourceExpression = "EKPO.Matkl", IsRequired = false, IsActive = true, SortOrder = 80 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "MaterialGroupText", SourceExpression = "WG.WgKomplett", IsRequired = false, IsActive = true, SortOrder = 90 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "NetValueChf", SourceExpression = "EKPO.NetwrChf", IsRequired = false, IsActive = true, SortOrder = 100 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "NetValueChfPerPiece", SourceExpression = "EKPO.NetwrChfStk", IsRequired = false, IsActive = true, SortOrder = 110 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "OrderQuantity", SourceExpression = "EKPO.Menge", IsRequired = false, IsActive = true, SortOrder = 120 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "ScheduleDate", SourceExpression = "EKET.Eindt", IsRequired = false, IsActive = true, SortOrder = 130 },
+            new SapFieldMapping { SiteId = siteId, TargetField = "ScheduleQuantity", SourceExpression = "EKET.Menge", IsRequired = false, IsActive = true, SortOrder = 140 });
+    }
+
+    private static void Replace<TEntity>(AppDbContext db, IQueryable<TEntity> oldRows, IEnumerable<TEntity> newRows)
+        where TEntity : class
+    {
+        var set = db.Set<TEntity>();
+        set.RemoveRange(oldRows);
+        set.AddRange(newRows);
+    }
+
+    private static Site Clone(Site site) => new()
+    {
+        Id = site.Id,
+        HanaServerId = site.HanaServerId,
+        Schema = site.Schema,
+        TSC = site.TSC,
+        Land = site.Land,
+        SourceSystem = site.SourceSystem,
+        UsernameOverride = site.UsernameOverride,
+        PasswordOverride = site.PasswordOverride,
+        LocalExportFolderOverride = site.LocalExportFolderOverride,
+        ManualImportFilePath = site.ManualImportFilePath,
+        ManualImportLastUploadedAtUtc = site.ManualImportLastUploadedAtUtc,
+        SapServiceUrl = site.SapServiceUrl,
+        SapEntitySet = site.SapEntitySet,
+        SapEntitySetsCache = site.SapEntitySetsCache,
+        SapEntitySetsRefreshedAtUtc = site.SapEntitySetsRefreshedAtUtc,
+        IsActive = site.IsActive
+    };
+}

TrafagSalesExporter/TrafagSalesExporter.Tests/DatabaseInitializationServiceTests.cs

@@ -102,6 +102,14 @@ public class DatabaseInitializationServiceTests : IDisposable
             x.TargetField == nameof(SalesRecord.DocumentType) &&
             x.SourceHeader == "=Alphaplan Excel");
         Assert.Equal(2, db.FieldTransformationRules.Count(x => x.SourceSystem == "MANUAL_EXCEL"));
+
+        var purchasing = Assert.Single(db.Sites, x => x.TSC == PurchasingDataSourcePageService.PurchasingTsc);
+        Assert.Equal("SAP", purchasing.SourceSystem);
+        Assert.Contains(db.SapSourceDefinitions, x => x.SiteId == purchasing.Id && x.Alias == "EKKO" && x.EntitySet == "EKKOSet" && x.IsPrimary);
+        Assert.Contains(db.SapSourceDefinitions, x => x.SiteId == purchasing.Id && x.Alias == "EKPO" && x.EntitySet == "EKPOSet");
+        Assert.Contains(db.SapSourceDefinitions, x => x.SiteId == purchasing.Id && x.Alias == "EKET" && x.EntitySet == "eketSet");
+        Assert.Contains(db.SapJoinDefinitions, x => x.SiteId == purchasing.Id && x.LeftAlias == "EKKO" && x.RightAlias == "EKPO");
+        Assert.Contains(db.SapFieldMappings, x => x.SiteId == purchasing.Id && x.TargetField == "NetValueChf" && x.SourceExpression == "EKPO.NetwrChf");
     }
 
     private async Task PrepareLegacySitesTableAsync()

TrafagSalesExporter/docs/PURCHASING_DASHBOARD_2026-06-05.md

@@ -46,9 +46,42 @@ Das Dashboard wurde fachlich um diese Bereiche erweitert:
   - `Kontrakte`
   - `Lieferanten`
   - `PBIX Vorlage`
+  - `3D Simulation`
+- Unterpunkt `Einkauf > Datenquellen` fuer SAP/OData-Verbindung, Quellen, Join-Fluss und Zielmappings.
 - Die Seite ist als Cockpit-Struktur umgesetzt und zweisprachig ueber den vorhandenen UI-Sprachservice vorbereitet.
 - Die Kennzahlen sind noch nicht live an SAP gebunden.
 
+## SAP/OData-Konfiguration
+
+Vorbefuellte Quellen:
+
+- `EKKO -> EKKOSet`
+- `EKPO -> EKPOSet`
+- `EKET -> eketSet`
+- `LIEF -> Data`
+- `WG -> Data2`
+
+Vorbefuellte Joins:
+
+- `EKKO.Ebeln = EKPO.Ebeln`
+- `EKPO.Ebeln,Ebelp = EKET.Ebeln,Ebelp`
+- `EKKO.Lifnr = LIEF.Lifnr`
+- `EKPO.Matkl = WG.Matkl`
+
+Die Seite verwendet dieselben Grundtabellen wie die Finance-/Standorte-Quellenpflege: `Sites`, `SapSourceDefinitions`, `SapJoinDefinitions`, `SapFieldMappings`.
+
+## 3D Simulation
+
+Das Einkaufsdashboard hat eine eigene 3D-Simulation fuer wichtige Einkaufsindikatoren:
+
+- Spend CHF.
+- Offener Bestellwert.
+- Offene Menge.
+- Kontrakt-Restwert.
+- Lieferantenperformance.
+
+Die Simulation nutzt feste Canvas-Groessen, sichtbare Achsen, waehlbare Diagrammarten, Labelgroesse und einen Szenario-Slider fuer Preis-/Wechselkurswirkung.
+
 ## Naechster Schritt fuer Live-Daten
 
 Fuer echte Werte muessen die Einkaufsquellen sauber gemappt werden:

TrafagSalesExporter/docs/rag/PROJECT.md

@@ -11,7 +11,8 @@ Stand: 2026-06-05
 - Neu im Finance/Management-Cockpit: einfache Schnelluebersicht links sichtbar; tiefere Funktionen bleiben unter `Experten`.
 - Neu in der Navigation: Menuebaum wird aus `NavigationMenuItems` gerendert; Admins koennen bestehende Punkte unter `Admin > Menuestruktur` umhaengen, sortieren und aus-/einblenden.
 - Neu als Hauptbereich: `Einkauf` mit Einkaufswagen-Icon und erweitertem `Einkauf Dashboard`.
-- Einkauf: `x.pbix` wurde als Vorlage analysiert; `/einkauf` enthaelt jetzt Struktur fuer Spend, offene Bestellungen, Mengenkontrakte, Lieferantenperformance und die PBIX-Reportseiten. Live-SAP-Anbindung ist noch offen.
+- Einkauf: `x.pbix` wurde als Vorlage analysiert; `/einkauf` enthaelt jetzt Struktur fuer Spend, offene Bestellungen, Mengenkontrakte, Lieferantenperformance, PBIX-Reportseiten und 3D-Simulation.
+- Einkauf: `Einkauf > Datenquellen` pflegt die SAP/OData-Konfiguration grafisch und ist mit `EKKOSet`, `EKPOSet`, `eketSet`, `Data`, `Data2`, Joins und Zielmappings vorbefuellt. Realer Kennzahlenimport ist noch offen.
 - Neu im Expertenbereich: `3D Datenanalyse` mit drehbarer 3D-Grafik, Achsen, Diagrammarten, Indikatorauswahl, Labelgroesse und Simulation per Schieberegler.
 - Spanien: `Run-SpainRangeExportAndUpload-AllInOne.ps1` exportiert Sage-Range direkt und laedt CSV/Summary via rclone nach SharePoint `trafag-bi:Import/Finance/Spanien`.
 - Spanien: Default-Range ist heute minus 7 Tage bis heute; `ToDate` ist exklusiv.

TrafagSalesExporter/lastchange.md

@@ -52,7 +52,9 @@ Diese Datei ist fuer tokenarme RAG-Nutzung komprimiert.
 - Neu umgesetzt: Neuer Hauptpunkt `Einkauf` mit Einkaufswagen-Icon und vorbereiteter Einstiegseite `Einkauf Dashboard`.
 - Neu umgesetzt: `x.pbix` als Einkaufs-/SAP-Vorlage analysiert und `Einkauf Dashboard` auf Spend, offene Bestellungen, Kontrakte, Lieferantenperformance und PBIX-Vorlagenstruktur erweitert.
 - Wichtig Einkauf: Aktuell ist die Seite fachlich strukturiert, aber noch nicht live an SAP/OData angebunden; fuer Echtwerte muessen Einkaufsquellen wie `EKKOSet`, `EKPOSet`, ggf. Termin-/Kontrakt- und Lieferantenbewertungsdaten gemappt werden.
-- Letzte Validierung: `dotnet test TrafagSalesExporter.sln --verbosity minimal` mit `83/83` Tests gruen.
+- Neu umgesetzt: `Einkauf > Datenquellen` als grafische SAP/OData-Quellenpflege analog Finance/Standorte; vorbefuellt mit `EKKOSet`, `EKPOSet`, `eketSet`, Lieferanten- und Warengruppen-Mapping, Joins und Zielmappings.
+- Neu umgesetzt: `Einkauf Dashboard > 3D Simulation` mit festen Canvas-Abmessungen, Achsenbeschriftung, Diagrammarten, Labelgroesse und Szenario-Slider fuer Preis-/Wechselkurswirkung.
+- Letzte Validierung: `dotnet test TrafagSalesExporter.sln --verbosity minimal` mit `83/83` Tests gruen; Test prueft auch Einkaufs-SAP-Seed mit Quellen/Joins/Mappings.
 
 ## Nachtrag 2026-06-05 Einkauf / PBIX
 
@@ -65,7 +67,10 @@ Quelle:
 Umgesetzt:
 
 - Einkaufsseite `/einkauf` von Platzhalter zu fachlichem Cockpit erweitert.
-- Tabs: `Uebersicht`, `Spend`, `Offene Bestellungen`, `Kontrakte`, `Lieferanten`, `PBIX Vorlage`.
+- Tabs: `Uebersicht`, `Spend`, `Offene Bestellungen`, `Kontrakte`, `Lieferanten`, `PBIX Vorlage`, `3D Simulation`.
+- Neuer Unterpunkt `Einkauf > Datenquellen` fuer die grafische SAP/OData-Konfiguration.
+- Standardquellen: `EKKO -> EKKOSet`, `EKPO -> EKPOSet`, `EKET -> eketSet`, `LIEF -> Data`, `WG -> Data2`.
+- Standardjoins: `EKKO.Ebeln = EKPO.Ebeln`, `EKPO.Ebeln,Ebelp = EKET.Ebeln,Ebelp`, `EKKO.Lifnr = LIEF.Lifnr`, `EKPO.Matkl = WG.Matkl`.
 - Zusaetzlich zu den PBIX-Sichten wurden die vom Einkauf genannten SAP-Themen aufgenommen:
   - Spend total vergangen nach Jahr, Lieferant, Warengruppe, Artikel.
   - Offene Bestellwerte und Mengen nach Lieferant, Warengruppe, Artikel.